Closure for fruit and other wide-mouthed jars



June 5-, 1923. I 1,457,418 F. E. BALDWIN CLOSURE FOR FRUIT AND OTHER WIDE MOUTHED JARS Filed April 22 1922 Wye/m5? WITNESS.

Afl'dRA/E Y,

Patented June 5, 1923.

- UNITED STATE FBEDEBIC E. BALDWIN, orrHILAnELrI-Im, PENNSYLVANIA. I Y

cLosUREroR FRUIT ND OTHER 'win'ri-iyrournnn Jens.

Application filed April 22, 1922. Serial No'.'556,042.

which the following is a specification.

The principal objects of the present invention are to provide a closure for fruit jars and other wide-mouthed containers which can be satisfactorily manufactured in glass or the like, which is light in weight yet sufficiently strong to be durable and not readily breakable, v tight with little manipulatlon, and which can be readily opened.

The invention will'be claimed at the end hereof but will be first described in connection with the embodiments of it chosen for illustration in the accompanying drawings forming part hereof and in which Figure 1 is a centralsectional view of a closure embodying features of the invent-ion and showing also a part of a fruit jar or receptacle of glass.

Fig. 2 is a plan view of the under slde ofthe cover shown in Figure 1, and

Fig. 3 is a sectional View of a portion of a closure illustrating another embodiment or modification ofthe invent-ion.

In the drawing the neck 1 is internally tapered and threaded and it is provided on the inside of its rim with an outwardly flaring seat 2 shown as generally flat. On the outside of the rim of the neck there is a bead 3 reinforcing the seat 1. 4: is a cover member provided with a centrally arranged hollow collar 5. At the union of the collar 5 and cover 4 there is a seat. As shown in Figure 1 this seat 6 consists of walls dis posed angularly in respect to each other. As shown in Fig. 3 this seat 6 is shown as spherical in form. The collar 5 is provided externally with segmental threads 7 of less width thanthe neck threads 8 to afiord endwise play, and the mold seams 9 on the cover are arranged between the thread segments 7 so as not to interfere with the threads 8. As shown in Figure 1 the gasket 10 is-circular in cross-section, and as shown in Fig. 3 the gasket 10" is flat or rectangular in cross-section. The gasket 10 is seated on the spherical seat 6 and is adapted for line contact as at a: with the flat seat 2.

In use the mold seam in no way interwhich can be closed very feres with the operation of the thread of which the pitchmay be such thatthe necessary pressure is brought upon the gasket by comparatively little turning. movement of the cover and such as to limit that turning movement. The reinforcement 3 enables the neck to resist the pressure of the gasket and 1 also to resist any stralns that may be caused by temperature changes. The cover, even though the friction between the engaging surfaces of the-threads may be great enough to bring about a condition sometimes referredto as frozen, can be readily removed by pushing it inward thus freeing the threads, and then turning it in the proper direction. The relative width of the threads i affords play for this inward motion of the cover as does also the gasket which can be a compressed for that purpose further than the compression to which it is possible to subject it by screwing the cover inward because the friction of the threads due to the pitch limits the inward screwing motion that can be accomplished in practice. The .line

expensive gasket.

To stack fruit ars one upon another is.

desirable and the described cover may present a flatv top surface which makes this comparatively inpossible, and bygproviding a rib 1 10n top of the cover it is possible to place a second fruit jar, indicated by'dotted lines in Figure 1, upon the cover of another fruit jar, and: the rib 11 in co-operation with the. concavity in the bottom of the superposed jarinsures an outwardly flaring'fiatseat and on the outside of its rim with a bead reinforcing the'flat seat, a cover member provided with a centrally arranged hollow collar having spherical form at its union with the cover and providing a seat, said collar having external segmental threads of less width than the neck threads to afford endwise play and i having the mold seam arranged between the 1 thread segments, and a flat gasket seated on the spherical seat and adapted for line contact with the flat seat.

2. A molded stopper having acylindrical body portion carrying threads interrupted 80 contact provided at m, Fig. 3, insures a tight I closure with. the use of a threads, the points of interruption corresponding with the lines at which mold seams may occur during the operation of molding t e st ppet 5. A stacking device comprising a glass fruit jar provided with a bottom having a fiat face at its rim portion in combination with a cover having a flat face at its rim portion, the cover and bottom being provided With interrengaging integral portions Within the flat faces of the cover and bottom.

FREDERIC E. BALDYVIN. 

